【入门夯实】流量计费玩家的推送优化：弱网降级写法

local function pushAll(kind, body)
    for _, name in ipairs(onlinePlayers) do
        sendRaw(name, kind, body)
    end
end

local DEGRADE = {
    sync = { interval = 60, keep = true },
    notice = { interval = 60, merge = true },
    rank = { interval = 0, keep = false },
}
local metered = {}
local function shouldPush(name, kind)
    local rule = DEGRADE[kind]
    if rule == nil then
        return true
    end
    if metered[name] and rule.interval == 0 then
        return false
    end
    return true
end
local function pushTo(name, kind, body)
    if not shouldPush(name, kind) then
        return
    end
    sendRaw(name, kind, body)
end

metered["无名小卒"] = true

local function usageAlert(name, usedMB, capMB)
    if usedMB > capMB * 0.8 then
        sendmsg(getplayerbyname(name), 1,
            "本月游戏流量已用 " .. usedMB .. "MB，接近套餐上限。")
    end
end